Vaillant ecoMAX 665 Installation And Maintenance Manual - page 12
12
Installation and maintenance manual ecoMAX 665
4 Installation
When installing, please observe the following points in
particular:
- the installion of a pump in the appliance circuit
- guarantee minimum circulation between appliance and
switch
- mount the siphon cartridge
When recharging:
- install the storage charging pump
- install gravity brake in the heating supply and in
the storage charging circuit if the cylinder is heated
directly by the appliance
- guarantee minimum circulation for recharging
J
J
A
B
Fig. 4.1: Appliance circuit (A) and heating circuit (B)
Caution!
The ecoMAX 665 may only be put into opera-
tion when a sufficiently dimensioned hydraulic
switch has been installed between appliance cir-
cuit and heating circuit.
4.1 Preparing the installation
Safety equipment for an emergency
• From the safety valve‘s blow-out line, a drain pipe with
intake guide and siphon must be led to a suitable out-
let. The outlet must be visible!
• If plastic pipes are used in the heating system, a suit-
able maximum thermostat must be mounted on the
heating supply (e.g. Vaillant feed thermostat 009
642). This is necessary in order to protect the heating
system from temperature-related damage in the event
of a malfunction.
• When using plastic pipes that are not diffusion tight
in the heating system, a system separation between
the heater and system by means of an external heat
exchanger must be performed in order to avoid corro-
sion occurring in the heater circuit or in the boiler.
4.2 Technical instructions for the heating system
Caution!
The following system diagrams are schematic
diagrams. They do not replace the full profes-
sional diagrams!
The system diagrams do not contain the shut-
off devices and safety devices necessary for
correct mounting.
Observe the applicable standards and guidelines.
4.2.1 Hydraulic decoupling with heating pump located
on the appliance side
ϑ
ϑ
17a
2
1
3
3
3
2
3
3
4
2
230V~
3
3
3
45
Fig. 4.2: radiator heating and floor heating, hydraulic separa-
tion, appliance-internal pump
1 ecoMAX
665
2
heating pump
17a supply temperature sensor
45 hydraulic
switch
A pump dimensioning doesn‘t have to be carried out.
The appliance pump is set up at the factory.
The pump output doesn‘t have to be set.
Selection of the hydraulic switch
A suitable WH model hydraulic switch (accessories) can be
selected with the aid of table 4.1.
A sufficiently large water volume (minimum circulating
water volume) is constantly supplied through the boiler
via the hydraulic switch in conjunction with the Vaillant
system pump (item no. 178 728) built into the boiler.
heating system output
heating system spread
10 K
15 K
20 K
ecoMAX 665
WH 160
WH 95
WH 95
double cascade
WH 280
WH 160
WH 95
triple cascade
WH 280
WH 280
WH 160
Table 4.1: Selection of the hydraulic switch, WH model
4 Installation